Process of treating brake bands of planetary transmissions



v a known to the trade uurrl-in S ATES PATENT orric I DANIEL n. SORENSON, or tronom'o, ommnio, CANADA, AssIGnoR-To Enso'N" L.

cannon, OFIGLEVELAND nmenws, omo.

rnocnss or TREATING BRAKE BANDS or PLANETARY TRANSMISSIONS.

1,414,311. No Drawing.

T 0 all 11:71 am it may concern:

Be' it known that-I, DAXu-n. M Sounxsox; a subjectof the King of Great Britain. re.-

siding at- Toronto. in the county of York.

Provinceof Ontario. Dominion of Canada,

have invented certain new and useful Iin-. )rovements ina- Process' of Treating Brake ands of Planetary Transmissions. of which the followingis a specification. Thls invention relates to a process, for

preventing the slipping or chatteringi of the speed or brake bands of the planetary transmissions ofcertainautomobiles and is a continuation in part of my application No. 483,997. filed July 11. 1921.

Asis well known to those familiar with. theoperation of such bands. the lubricants ordinarily employed therewith will. under the influence of the heat of the motor and that due to the friction. produce a'carbon residue "which will form a hard glazed de posit upon the bands and their cooperating braking surfaces. The presence of this hard glazed deposit causes the brake hands. when applied, alternately to grip. and to slipnpon, the cooperating surfaces. producing what is as the ('liattering" of the bands. Y

In the practice of my invention I apply to and between the brake bands and their cooperating surfaces or drums a lubricating compound produced as follows:

For a base for such lubricant. I employ an ordinary neutral mineral oil (such as defined in vol. 2 ofThe American Petroleum Industry, by Bacon & Hamor. published by -McGraw -Hill Book Company, Inc... at' New .York in 1916) having a body varying in' viscosity from 200 to 300. Saybolt. at

"chattering thereof "which consists in applyabout five .per cent and not more than ten. per cent, in quantity of a soap produced by 100 F. To such base, I add, preferably and heating the soap to liquefy the same and render it miscible with such base.

The compound thus produced'is not in- Specification of Letters Patent. I Patented Apr, 25, 1922, Application filed March 25, 1922. Serial No. 546,543. l

jnrious ly aiiected by the heat incidental to the operation of the motor and of the brake bands and will not produce an amount of carbon sufficientto'form the hard glazed de-- posit referred to and thereby prevent the smooth-operation ()f'sll('h-lnm(ls.' ()n the other hand, it creates a soft film or surfacing which; acts. as a cushion between the.

interengageable surfaces and prevents the alternate gripp ng and slipping. or chattering action.

Having described my invention, what I claim i's:-' a

1. The process of treating the brake bands ofplanetary transmissions. to prevent the 'chatteringthereof which consists in applying to and between such bands and their cooperating parts-a lubricant comprising a base of neutral m1neral .oil having a soap mingiled .therewith.

2. The process of treating the brake bands 1 r of planetary transmissions to prevent the chattering thereof which consists in applying to and between-such bands and their c. o-

operating parts a lubricant comprising a base of mineraloil having a viscosity of from 200 to 300 andhavingra soap mingled therewith. 3. The process of treating the brake bands of planetary transmissions toprevent the chattering thereof which consists in applying to and between such bands and their cooperating parts a. lubricant comprising a base of mineral" oil having a viscosity of from 200 to 300and'having mingled therewith not materially more than ten per cent of a-soap- 4. The process of treating the brake bands of planetary transmissions to prevent the ing to and between such bands and theircooperating parts .a' lubricant comprising a .base of lubricating oil having a soap mingled therewith. i

DANIEL M. SORENSON'. 

